[mime_sniffer] Delete
This library no longer has any clients.
Change-Id: I5e3d0c1f7a9b17ca578f4e492258e070129b3777
diff --git a/garnet/lib/mime_sniffer/BUILD.gn b/garnet/lib/mime_sniffer/BUILD.gn
deleted file mode 100644
index a2559c0..0000000
--- a/garnet/lib/mime_sniffer/BUILD.gn
+++ /dev/null
@@ -1,44 +0,0 @@
-# Copyright 2018 The Fuchsia Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import("//build/package.gni")
-import("//build/testing/environments.gni")
-
-source_set("mime_sniffer") {
- sources = [
- "mime_sniffer.cc",
- "mime_sniffer.h",
- ]
- public_deps = [
- "//garnet/public/lib/fxl",
- ]
-}
-
-executable("unittests") {
- testonly = true
- output_name = "mime_sniffer_unittests"
- sources = [
- "mime_sniffer_unittest.cc",
- ]
-
- deps = [
- ":mime_sniffer",
- "//third_party/googletest:gtest_main",
- ]
-}
-
-package("mime_sniffer_unittests") {
- testonly = true
-
- deps = [
- ":unittests",
- ]
-
- tests = [
- {
- name = "mime_sniffer_unittests"
- environments = basic_envs
- },
- ]
-}
diff --git a/garnet/lib/mime_sniffer/OWNERS b/garnet/lib/mime_sniffer/OWNERS
deleted file mode 100644
index a2c1e1b..0000000
--- a/garnet/lib/mime_sniffer/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-abarth@google.com
-*
diff --git a/garnet/lib/mime_sniffer/mime_sniffer.cc b/garnet/lib/mime_sniffer/mime_sniffer.cc
deleted file mode 100644
index 9fc5b66..0000000
--- a/garnet/lib/mime_sniffer/mime_sniffer.cc
+++ /dev/null
@@ -1,174 +0,0 @@
-// Copyright 2018 The Fuchsia Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "garnet/lib/mime_sniffer/mime_sniffer.h"
-
-#include <stdint.h>
-#include <string>
-#include <vector>
-
-#include "lib/fxl/strings/ascii.h"
-#include "lib/fxl/strings/string_view.h"
-
-namespace mime_sniffer {
-
-// The number of content bytes we need to use all our magic numbers.
-static const size_t kBytesRequiredForMagic = 42;
-
-struct MagicNumber {
- const char* mime_type;
- const char* magic;
- size_t magic_len;
- bool is_string;
- const char* mask; // if set, must have same length as |magic|
-};
-
-// Magic strings are case insensitive and must not include '\0' characters
-#define MAGIC_STRING(mime_type, magic) \
- { (mime_type), (magic), sizeof(magic) - 1, true, nullptr }
-
-#define MAGIC_NUMBER(mime_type, magic) \
- { (mime_type), (magic), sizeof(magic) - 1, false, nullptr }
-
-// Our HTML sniffer differs slightly from Mozilla. For example, Mozilla will
-// decide that a document that begins "<!DOCTYPE SOAP-ENV:Envelope PUBLIC " is
-// HTML, but we will not.
-
-#define MAGIC_HTML_TAG(tag) MAGIC_STRING("text/html", "<" tag)
-
-static const std::vector<const MagicNumber> kSniffableTags{
- // DOCTYPEs
- MAGIC_HTML_TAG("!DOCTYPE html"), // HTML5 spec
- // Sniffable tags, ordered by how often they occur in sniffable documents.
- MAGIC_HTML_TAG("script"), // HTML5 spec, Mozilla
- MAGIC_HTML_TAG("html"), // HTML5 spec, Mozilla
- MAGIC_HTML_TAG("!--"),
- MAGIC_HTML_TAG("head"), // HTML5 spec, Mozilla
- MAGIC_HTML_TAG("iframe"), // Mozilla
- MAGIC_HTML_TAG("h1"), // Mozilla
- MAGIC_HTML_TAG("div"), // Mozilla
- MAGIC_HTML_TAG("font"), // Mozilla
- MAGIC_HTML_TAG("table"), // Mozilla
- MAGIC_HTML_TAG("a"), // Mozilla
- MAGIC_HTML_TAG("style"), // Mozilla
- MAGIC_HTML_TAG("title"), // Mozilla
- MAGIC_HTML_TAG("b"), // Mozilla
- MAGIC_HTML_TAG("body"), // Mozilla
- MAGIC_HTML_TAG("br"),
- MAGIC_HTML_TAG("p"), // Mozilla
-};
-
-// Compare content header to a magic number where magic_entry can contain '.'
-// for single character of anything, allowing some bytes to be skipped.
-static bool MagicCmp(const char* magic_entry, const char* content, size_t len) {
- while (len) {
- if ((*magic_entry != '.') && (*magic_entry != *content))
- return false;
- ++magic_entry;
- ++content;
- --len;
- }
- return true;
-}
-
-// Like MagicCmp() except that it ANDs each byte with a mask before
-// the comparison, because there are some bits we don't care about.
-static bool MagicMaskCmp(const char* magic_entry, const char* content,
- size_t len, const char* mask) {
- while (len) {
- if ((*magic_entry != '.') && (*magic_entry != (*mask & *content)))
- return false;
- ++magic_entry;
- ++content;
- ++mask;
- --len;
- }
- return true;
-}
-
-static bool MatchMagicNumber(const char* content, size_t size,
- const MagicNumber& magic_entry,
- std::string* result) {
- const size_t len = magic_entry.magic_len;
-
- // Keep kBytesRequiredForMagic honest.
- FXL_DCHECK(len <= kBytesRequiredForMagic);
-
- // To compare with magic strings, we need to compute strlen(content), but
- // content might not actually have a null terminator. In that case, we
- // pretend the length is content_size.
- const char* end = static_cast<const char*>(memchr(content, '\0', size));
- const size_t content_strlen =
- (end != nullptr) ? static_cast<size_t>(end - content) : size;
-
- bool match = false;
- if (magic_entry.is_string) {
- if (content_strlen >= len) {
- // Do a case-insensitive prefix comparison.
- FXL_DCHECK(strlen(magic_entry.magic) == len);
- match = fxl::EqualsCaseInsensitiveASCII(
- fxl::StringView(magic_entry.magic, len),
- fxl::StringView(content, len));
- }
- } else {
- if (size >= len) {
- if (!magic_entry.mask) {
- match = MagicCmp(magic_entry.magic, content, len);
- } else {
- match = MagicMaskCmp(magic_entry.magic, content, len, magic_entry.mask);
- }
- }
- }
-
- if (match) {
- result->assign(magic_entry.mime_type);
- return true;
- }
- return false;
-}
-
-static bool CheckForMagicNumbers(
- const char* content, size_t size,
- const std::vector<const MagicNumber>& magic_numbers, std::string* result) {
- for (const MagicNumber& magic : magic_numbers) {
- if (MatchMagicNumber(content, size, magic, result))
- return true;
- }
- return false;
-}
-
-// Truncates |size| to |max_size| and returns true if |size| is at least
-// |max_size|.
-static bool TruncateSize(const size_t max_size, size_t* size) {
- // Keep kMaxBytesToSniff honest.
- FXL_DCHECK(static_cast<int>(max_size) <= kMaxBytesToSniff);
-
- if (*size >= max_size) {
- *size = max_size;
- return true;
- }
- return false;
-}
-
-// Returns true and sets result if the content appears to be HTML.
-// Clears have_enough_content if more data could possibly change the result.
-bool SniffForHTML(const char* content, size_t size, bool* have_enough_content,
- std::string* result) {
- // For HTML, we are willing to consider up to 512 bytes. This may be overly
- // conservative as IE only considers 256.
- *have_enough_content &= TruncateSize(512, &size);
-
- // We adopt a strategy similar to that used by Mozilla to sniff HTML tags,
- // but with some modifications to better match the HTML5 spec.
- const char* const end = content + size;
- const char* pos;
- for (pos = content; pos < end; ++pos) {
- if (!fxl::IsAsciiWhitespace(*pos))
- break;
- }
- // |pos| now points to first non-whitespace character (or at end).
- return CheckForMagicNumbers(pos, end - pos, kSniffableTags, result);
-}
-
-} // namespace mime_sniffer
diff --git a/garnet/lib/mime_sniffer/mime_sniffer.h b/garnet/lib/mime_sniffer/mime_sniffer.h
deleted file mode 100644
index e9feca8..0000000
--- a/garnet/lib/mime_sniffer/mime_sniffer.h
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2018 The Fuchsia Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef GARNET_LIB_MIME_SNIFFER_MIME_SNIFFER_H_
-#define GARNET_LIB_MIME_SNIFFER_MIME_SNIFFER_H_
-
-#include <stdint.h>
-#include <string>
-
-// The content was this file and mime_sniffer.cc were copied from
-// https://chromium.googlesource.com/chromium/src/net/+/master/base/mime_sniffer.h
-// and its counterpart. Only the code which can be used to sniff Htnml was
-// copied. Minimum modifications were done so that we can use this with fuchsia.
-// If we decide to port whole code we should also port unittests.
-
-namespace mime_sniffer {
-
-// The maximum number of bytes used by any internal mime sniffing routine.
-//
-// This must be updated if any internal sniffing routine needs more bytes.
-const int kMaxBytesToSniff = 1024;
-
-bool SniffForHTML(const char* content, size_t size, bool* have_enough_content,
- std::string* result);
-
-} // namespace mime_sniffer
-
-#endif // GARNET_LIB_MIME_SNIFFER_MIME_SNIFFER_H_
diff --git a/garnet/lib/mime_sniffer/mime_sniffer_unittest.cc b/garnet/lib/mime_sniffer/mime_sniffer_unittest.cc
deleted file mode 100644
index 93c83ba..0000000
--- a/garnet/lib/mime_sniffer/mime_sniffer_unittest.cc
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2018 The Fuchsia Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "garnet/lib/mime_sniffer/mime_sniffer.h"
-#include "gtest/gtest.h"
-
-namespace mime_sniffer {
-namespace {
-
-// Turn |str|, a constant string with one or more embedded NULs, along with
-// a NUL terminator, into an std::string() containing just that data.
-// Turn |str|, a string with one or more embedded NULs, into an std::string()
-template <size_t N>
-std::string MakeConstantString(const char (&str)[N]) {
- return std::string(str, N - 1);
-}
-
-static bool IsHtmlType(const std::string& content) {
- std::string mime_type;
- bool have_enough_content;
- return SniffForHTML(content.data(), content.size(), &have_enough_content,
- &mime_type);
-}
-
-TEST(MimeSnifferTest, HtmlSniffingTest) {
- std::string result;
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<!DOCTYPE html PUBLIC")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString(" \n <hTmL>\n <hea")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<html><body>text</body></html>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<body>text</body>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<p>text</p>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<div>text</div>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<head>text</head>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<iframe>text</iframe>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<h1>text</h1>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<br/>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<a>text</a>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<table>text</table>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<script>text</script>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<font>text</font>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<b>text</b>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<title>text</title>")));
- EXPECT_TRUE(IsHtmlType(MakeConstantString("<style>text</style>")));
-
- EXPECT_FALSE(
- IsHtmlType(MakeConstantString("GIF87a\n<html>\n<body>"
- "<script>alert('haxorzed');\n</script>"
- "</body></html>\n")));
- EXPECT_FALSE(
- IsHtmlType(MakeConstantString("a\n<html>\n<body>"
- "<script>alert('haxorzed');\n</script>"
- "</body></html>\n")));
-}
-
-} // namespace
-} // namespace mime_sniffer
diff --git a/garnet/packages/tests/BUILD.gn b/garnet/packages/tests/BUILD.gn
index 1f940ee1..12bb9d5 100644
--- a/garnet/packages/tests/BUILD.gn
+++ b/garnet/packages/tests/BUILD.gn
@@ -322,7 +322,6 @@
"//garnet/packages/tests:mediaplayer",
"//garnet/packages/tests:mediasession",
"//garnet/packages/tests:memory_monitor",
- "//garnet/packages/tests:mime_sniffer",
"//garnet/packages/tests:netcfg_tests",
"//garnet/packages/tests:netemul",
"//garnet/packages/tests:netfilter",
@@ -772,13 +771,6 @@
]
}
-group("mime_sniffer") {
- testonly = true
- public_deps = [
- "//garnet/lib/mime_sniffer:mime_sniffer_unittests",
- ]
-}
-
group("network_time") {
testonly = true
public_deps = [
